diff --git a/package.json b/package.json
index b6e4b128..a3eabd7c 100644
--- a/package.json
+++ b/package.json
@@ -3,20 +3,20 @@
   "version": "0.8.0-dev",
   "description": "JavaScript library for mobile-friendly interactive maps",
   "devDependencies": {
-    "copyfiles": "0.1.0",
-    "eslint": "^0.15.1",
+    "copyfiles": "0.2.1",
+    "eslint": "^0.20.0",
     "happen": "~0.1.3",
-    "jake": "~8.0.10",
+    "jake": "~8.0.12",
     "karma": "~0.12.31",
-    "karma-chrome-launcher": "^0.1.7",
-    "karma-coverage": "~0.2.7",
+    "karma-chrome-launcher": "^0.1.8",
+    "karma-coverage": "~0.3.1",
     "karma-firefox-launcher": "~0.1.4",
     "karma-mocha": "~0.1.10",
     "karma-phantomjs-launcher": "^0.1.4",
     "karma-safari-launcher": "~0.1.1",
-    "mocha": "~2.1.0",
+    "mocha": "~2.2.4",
     "tin": "^0.5.0",
-    "uglify-js": "~2.4.16"
+    "uglify-js": "~2.4.21"
   },
   "main": "dist/leaflet-src.js",
   "style": "dist/leaflet.css",